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Special Issue "Plant Defense Response to Microbial, Herbivorous, and Environmental Interactions"

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A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Plant Sciences".

Deadline for manuscript submissions: 31 October 2023 | Viewed by 3196

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Special Issue Editor

Prof. Dr. Young-sang Ahn

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Guest Editor

Department of Forest Resources, College of Agriculture and Life Sciences, Chonnam National University, Gwangju 61186, Republic of Korea
Interests: plant diseases; insect pests; plant–microbial interactions; plant defense mechanisms; biological control; plant growth promotion
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Special Issue Information

Dear Colleagues,

Plants are the primary producers and thus the main source of nutrients for other organisms including fungi, bacteria, and animals. Some organisms have developed mutualistic relationships with plants, while others are destructive. Plants have evolved numerous signaling pathways to detect and respond to fungal, bacterial, and viral infections, herbivorous attacks, and abiotic stress through the biosynthesis of structural and physiological protein-based defense mechanisms. This Special Issue will accept articles reporting on inducible plant defense responses including chemical defense systems, such as microbial-associated molecular patterns (MAMPs), hypersensitive responses, pathogen-degrading enzymes, pathogenic-related (PR) proteins (like defensins, chitinases, β-1,3-glucanases, thaumatin-like, proteases, peroxidase, salicylate, and jasmonate) and toxic chemicals (such as terpenes, phenolics, and histamines), and mechanisms by which pathogens overcome plant resistance. The Special Issue will also consider studies reporting mechanisms of mutualistic plant–microbial interactions, microbial-induced plant defense, and microbial chemicals used in biological control, stress tolerance, and plant growth stimulation.

Prof. Dr. Young-sang Ahn
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. International Journal of Molecular Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. There is an Article Processing Charge (APC) for publication in this open access journal. For details about the APC please see here. Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

plant pathogenic infections
insect pest damage
abiotic stress
plant/microbial chemical signaling
innate immunity
systemic acquired resistance (SAR)
pathogen-related proteins
plant defense enzymes
plant growth hormones

Published Papers (3 papers)

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Research

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Open AccessArticle

Entomopathogenic Potential of Bacillus velezensis CE 100 for the Biological Control of Termite Damage in Wooden Architectural Buildings of Korean Cultural Heritage

and

Int. J. Mol. Sci. 2023, 24(9), 8189; https://doi.org/10.3390/ijms24098189 - 03 May 2023

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Abstract

Biocontrol strategies are gaining tremendous attention in insect pest management, such as controlling termite damage, due to the growing awareness of the irreparable harm caused by the continuous use of synthetic pesticides. This study examines the proteolytic and chitinolytic activities of Bacillus velezensis CE 100 and its termiticidal effect through cuticle degradation. The proteolytic and chitinolytic activities of B. velezensis CE 100 systematically increased with cell growth to the respective peaks of 68.3 and 128.3 units/mL after seven days of inoculation, corresponding with the highest cell growth of 16 × 10⁷ colony-forming units (CFU)/mL. The in vitro termiticidal assay showed that B. velezensis CE 100 caused a rapid and high rate of termite mortality, with a median lethal time (LT50) of >1 h and the highest mortality rates of 91.1% and 92.2% recorded at 11 h and 12 h in the bacterial broth culture and crude enzyme fraction, respectively. In addition to broken setae and deformed sockets, termites treated with the bacterial broth culture exhibited degraded epicuticles, while the crude enzyme fraction caused severe disintegration of both the epicuticle and endocuticle. These results indicate the tremendously higher potential of B. velezensis CE 100 in the biological control of subterranean termites compared to the previously used entomopathogenic bacteria. Full article

(This article belongs to the Special Issue Plant Defense Response to Microbial, Herbivorous, and Environmental Interactions)

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Open AccessArticle

The Phaseolus vulgaris Receptor-Like Kinase PvFER1 and the Small Peptides PvRALF1 and PvRALF6 Regulate Nodule Number as a Function of Nitrate Availability

Jorge Solís-Miranda

Marco A. Juárez-Verdayes

and

Int. J. Mol. Sci. 2023, 24(6), 5230; https://doi.org/10.3390/ijms24065230 - 09 Mar 2023

Cited by 2 | Viewed by 1096

Abstract

Legumes associate with Gram-negative soil bacteria called rhizobia, resulting in the formation of a nitrogen-fixing organ, the nodule. Nodules are an important sink for photosynthates for legumes, so these plants have developed a systemic regulation mechanism that controls their optimal number of nodules, the so-called autoregulation of nodulation (AON) pathway, to balance energy costs with the benefits of nitrogen fixation. In addition, soil nitrate inhibits nodulation in a dose-dependent manner, through systemic and local mechanisms. The CLE family of peptides and their receptors are key to tightly controlling these inhibitory responses. In the present study, a functional analysis revealed that PvFER1, PvRALF1, and PvRALF6 act as positive regulators of the nodule number in growth medium containing 0 mM of nitrate but as negative regulators in medium with 2 and 5 mM of nitrate. Furthermore, the effect on nodule number was found to be consistent with changes in the expression levels of genes associated with the AON pathway and with the nitrate-mediated regulation of nodulation (NRN). Collectively, these data suggest that PvFER1, PvRALF1, and PvRALF6 regulate the optimal number of nodules as a function of nitrate availability. Full article

(This article belongs to the Special Issue Plant Defense Response to Microbial, Herbivorous, and Environmental Interactions)

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Advances in the Biosynthesis of Terpenoids and Their Ecological Functions in Plant Resistance

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Int. J. Mol. Sci. 2023, 24(14), 11561; https://doi.org/10.3390/ijms241411561 - 17 Jul 2023

Viewed by 681

Abstract

Secondary metabolism plays an important role in the adaptation of plants to their environments, particularly by mediating bio-interactions and protecting plants from herbivores, insects, and pathogens. Terpenoids form the largest group of plant secondary metabolites, and their biosynthesis and regulation are extremely complicated. Terpenoids are key players in the interactions and defense reactions between plants, microorganisms, and animals. Terpene compounds are of great significance both to plants themselves and the ecological environment. On the one hand, while protecting plants themselves, they can also have an impact on the environment, thereby affecting the evolution of plant communities and even ecosystems. On the other hand, their economic value is gradually becoming clear in various aspects of human life; their potential is enormous, and they have broad application prospects. Therefore, research on terpenoids is crucial for plants, especially crops. This review paper is mainly focused on the following six aspects: plant terpenes (especially terpene volatiles and plant defense); their ecological functions; their biosynthesis and transport; related synthesis genes and their regulation; terpene homologues; and research and application prospects. We will provide readers with a systematic introduction to terpenoids covering the above aspects. Full article

(This article belongs to the Special Issue Plant Defense Response to Microbial, Herbivorous, and Environmental Interactions)

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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

plant pathogenic infections
insect pest damage
abiotic stress
plant/microbial chemical signaling
innate immunity
systemic acquired resistance (SAR)
pathogen-related proteins
plant defense enzymes
plant growth hormones

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Special Issue "Plant Defense Response to Microbial, Herbivorous, and Environmental Interactions"

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